Legio III Illyrica

Legio III Illyrica was a Roman legion which was raised in Narona, Illyria in 268 AD by Cecropius. During the Crisis of the Third Century, Legio III Illyrica was loyal to Aurelian, and it took part in a cross-Adriatic Sea invasion of Italy in 271 AD to assist Aurelian in his war against the pretender Quintillus.